Fan account (Thanks to Robsessed):
My friend and I waited almost 5 hours but it paid off! Caitlin was very nice and she gave us bottles of water because it was so hot outside. David was also very nice and took pictures with us. Rob was going in and out of his trailer to set but after they wrapped shooting, there were only about 6 of us and Rob agreed to come out and sign autographs but no pictures. He was very sweet and so beautiful in real life! Both Rob and David said filming was going really well... day 4 of a 40 day shoot.
PopSugar has a few more pics (which you can see in HQ below)